The first LDS Sunday I ever had was when I was a Navy recruit at Great Lakes and this was the subject of discussion that day. It was to remind us of the stuff Sailors (and Marines too) we are made of.
Hel. 5: 12
12 And now, my sons, remember, remember that it is upon the arock of our Redeemer, who is Christ, the Son of God, that ye must build your bfoundation; that when the devil shall send forth his mighty winds, yea, his shafts in the whirlwind, yea, when all his hail and his mighty storm shall beat upon you, it shall have no power over you to drag you down to the gulf of misery and endless wo, because of the rock upon which ye are built, which is a sure foundation, a foundation whereon if men build they cannot fall.